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Can I take 2.5mg and Symbicort turbohaler together?

Drug interaction guide

Bisoprolol and Symbicort (which contains formoterol and budesonide) work against each other. Bisoprolol may make the Symbicort less effective at opening your airways, which could lead to breathing difficulties or an asthma attack. Additionally, Symbicort can sometimes cause a drop in potassium levels or an irregular heartbeat, which may be complicated by taking a beta-blocker like bisoprolol.

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Why this happens

Bisoprolol is a 'beta-blocker' and formoterol (in Symbicort) is a 'beta-agonist'. They target the same receptors in the body but have opposite effects: one narrows the airways while the other tries to widen them. This 'antagonism' means they can cancel each other out.

You must speak to your doctor before taking these together. If you have asthma, beta-blockers like bisoprolol are usually avoided. If your doctor has prescribed both, it is because they feel the benefit outweighs the risk, but you must be closely monitored. Seek medical help immediately if you find it harder to breathe or if you experience sudden wheezing.

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Taking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.

Disclaimer

This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.

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Article history

The information on this page is written and peer reviewed by qualified clinicians.

  • 14 Mar 2026 | Originally published
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